Added support for tumbnail override field
Added tests for thumbnail modal
Fixes to some comments
Added dist files for testing
Fix for display of thumbnail field when there is no article thumbnail
Added additional check to ensure that article thumbnail acutally changed
Rebuilt dist files
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues
Fixing some thumbnail modal issues